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7.2 Feedback potentiometer
The feedback potentiometer offers the option of monitoring
the current position of the actuator.
It must be utilized as a voltage divider. The change in
position of the potentiometer wiper (which corresponds to
the actuator position) can be measured as a changing
voltage between U+ and UM.
Other circuit layouts produce measurement results that are
inaccurate and do not remain stable over a long period of
time or are non-reproducible. They also reduce the service
life of the feedback potentiometer.
The feedback potentiometer can be retrofitted on actuator
IC 20, see page 74 (Accessories).On the IC 20..E, a 4 – 20
mA continuous signal is used for position feedback.
IC 40 cannot be retrofitted with a potentiometer. As an
option, the actuator is available with fitted potentiometer. 72